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DR. CYNTHIA THU NGUYEN O.D,
NPI 1942339569
Optometrist in Orange, CA

Active since March 02, 2007PECOS Enrolled
1964 N TUSTIN ST, ORANGE, CA 92865(714) 282-0111 Get Directions Write a Review

NPPES record last updated: July 30, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Cynthia Thu Nguyen O.d, NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CYNTHIA THU NGUYEN O.D, (NPI 1942339569) is an individual optometrist in Orange, California, licensed in California (10271T) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1942339569
Entity TypeIndividualFemale
Primary Taxonomy152W00000X
Provider Legal NameDR. CYNTHIA THU NGUYENCredential: O.D,
Location Address1964 N TUSTIN STOrange, CA 92865-3950
Mailing Address1964 N Tustin StOrange, CA 92865-3950 · (714) 282-0111 · Fax (714) 282-0213
Phone(714) 282-0111
Sole ProprietorNo
Enumeration DateMarch 2, 2007
Last NPPES UpdateJuly 30, 2007
✔ NPI 1942339569 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · 10271T
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
1964 N TUSTIN ST, Orange, CA 92865
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Other Identifiers 3

MedicaidSD0102710CA
Medicare ID-Type UnspecifiedOP10271CA · Medicare
Medicare UPINU56067CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Cynthia Thu Nguyen O.d, is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Cynthia Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Alvin Arellano, O.D., Inc.
8.2 mi
Corneal and Contact Management
1909 W MALVERN AVE
Fullerton, CA 92833
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Alvin Arellano Od Inc
  • 8 clinicians in this Medicare group
NPI 1275653222 (714) 992-8020

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92865 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CYNTHIA T. NGUYEN, O.D., INC.
Optometrist
1964 N TUSTIN ST
ORANGE, CA 92865
Orange County (714) 282-0111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Cynthia Nguyen's NPI number?

The NPI number for Cynthia Nguyen is 1942339569. It was assigned to this individual provider in the NPPES registry on March 2, 2007.

Where is Cynthia Nguyen located?

Cynthia Nguyen practices at 1964 N Tustin St, Orange, CA 92865. The listed phone number is (714) 282-0111.

What is Cynthia Nguyen's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Cynthia Nguyen enrolled in Medicare?

Yes. Cynthia Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Cynthia Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cynthia Nguyen reassigns Medicare benefits to Alvin Arellano, O.D., Inc. (Fullerton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Cynthia Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Cynthia Nguyen was last updated on July 30, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.